Simon ingersoll



S. INGERSOLL.

i PAWL DRILL. No. 11,787. I PATENTED OCTQlO, 185

UNITED STATES PATENT OFFICE.

SIMON INGERSOLL, 'OF NEV YORK, Y.

PAWL-DRILL.

lSpecification of Letters Patent N o. 11,787, dated October 10, 1854.

To all whom t may concern Be it known that I, SIMON INGEnsoLL, of thecity, county, and State of New York, have invented certain new anduseful, Improvements in a Pawl-Drill; and I do hereby declare that thesame are described and represented in the following specification anddrawings.

There have been two or more kinds of pawl drills constructed prior to myinvention, one consisting of a straight shaft with two ratchet wheelsfastened upon it with a lever to work loose between to carry two pawlsto act upon the wheels as the lever is vibrated so as to rotate theshaft and drill. The other consisting of a shaft to carry the drill withtwo ratchets upon it, also two bevel wheels fitted to turn loose uponthe shaft and carry two pawls to act upon the ratchets fastened to theshaft; the two bevel wheels being operated by a bevel wheel fitted toturn on a stud, which stud is fitted to turn loose upon the shaftbetween the two ratchets; the last mentioned wheel being operated by alever fastened to it so as to vibrate in a plane parallel to the shaftand drill but not in the same plane; while in the drill first describedthe lever had to be v'ibrated in a plane at right angles to the shaftand drill therefore a hole could not be bored with it unless there wasroom to vibrate the lever in a plane at right angles to the shaft anddrill. And in the one described last the lever being vibrated in a planeparallel to the shaft and drill but not in the same plane, there is aconstant tendency to crowd or press'the drill out of the proper positionso as to render it difficult to drill a straight and true hole.

Now the object of my invention is to obviate the defects abovementioned, which I have effected by arranging my lever so that it can bevibrated in the same plane in which the shaft and drill is operated; orin a plane at right angles to it, so that my drill has the advantages ofboth the drills above mentioned, wit-hout the tendency to pass one sidelike the one last mentioned. For my improvement consists of a centerpiece fitted to turn on the shaft 0r stock of the drill, with twogudgeons projecting from it in opposite directions upon which two beveland ratchet wheels turn which drive a pinion fastened to the shaft andoperate the drill; which gudgeons form or support the fulcra of thevibrating lever, which carries two pawls to operate the ratchet andbevel wheels above mentioned.

To'enable others skilled inthe art to make and use my improvements Iwill proceed to describe their construction and operation, referring tothe drawings above mentioned, in which the same letters indicate likeparts in each of the figures.

Figure l is a plan and Fig. 2 a section through the line z z, Fig. l.

A is a shaft with a socket B for the shank of a drill; and a male screwC on the opposite end to which the female screw in the tube D is fitted,to which tube the friction is to be applied to retain it and force thedrill forward in boring a hole. There is a center piece E fitted to turnon the shaft A with two pivots F F projecting from it in oppositedirections at right angles to the shaft A' gears G are scored across soas to forni ratchet teeth which the sliding pawls I I catch against,which pawls are inserted in holes fitted for them in the lever J, andare pressed against the gear or ratchet by the spiral springs K K placedin the holes behind the pawls for that purpose.

The lever J is forked at one end sol as to embrace the gears G G, andthe ends of both parts are perforated for the screws L L which screwinto the ends of the pivots F F and form the fulcra upon which the leverJ is vibrated so as to turn the gears G by the pawls I I, which aresharpened by beveling so that the thin points stands in oppositedirections so as to turn one gear when moved in one direction and theother when moved in the opposite, so as to operate the pinion H and turnthe shaft A to operate a drill or other tool inserted in the socket ofthe shaft A. The center piece E is retained in its proper position bythe pinion H on one side, and the collar M on the other side, both ofthem being fastened to the shaft A. When the lever J is vibrated in thedirection of the arrow N the drill is turned when it is moved eitherway; but when' the lever is vibrated in the direction of the arrow O itmoves the drill when it is vibrated in one dione direction counteractsthe other so as to bore a straight and true hole.

VI contemplate making the gudgeon or pivots to extend beyond the Wheelsso that the ends of the lever may be fitted to them by making scores orbearings in the ends and applying a cap or some equivalent ixture.

What I claim as my invention and desire to secure by Letters Patent inthe above described drill is- The center piece E constructed with tWogudgeons or pivots or their equivalents for the Wheels G G to turn uponand to form or support the fulcra of the lever J by which the drill isoperated: thereby enabling the sIMoN INGERsoLL.`

Witnesses:

JOHN ONEIL, J. DENNIS, J r.

